CN112262267B

CN112262267B - Vibration-proof device with bracket

Info

Publication number: CN112262267B
Application number: CN202080003210.XA
Authority: CN
Inventors: 近藤弘基; 大木健司
Original assignee: Sumitomo Riko Co Ltd
Current assignee: Sumitomo Riko Co Ltd
Priority date: 2019-03-26
Filing date: 2020-02-10
Publication date: 2022-06-14
Anticipated expiration: 2040-02-10
Also published as: US11454295B2; JP2020159446A; JP7217186B2; US20210048086A1; CN112262267A; WO2020195243A1

Abstract

The invention provides a vibration isolator with a bracket, which has a novel structure and can prevent a vibration isolator main body from falling off from the bracket with high reliability by using a structure which can be simply manufactured. In a vibration damping device body (12) in which a first mounting member (14) and a second mounting member (16) are connected by a body rubber elastic body (18), fitting portions (24, 24) provided on both sides in the width direction of the second mounting member (16) are fitted into fitting grooves (86, 86) provided on opposing inner surfaces (85, 85) on both sides in the width direction of a bracket (66), so that the vibration damping device body (12) is assembled to the bracket (66) from the lateral direction, in the vibration damping device (10) with the bracket, a locking hole (96) is provided in a distal wall portion (90) of the bracket (66) located on the distal side in the assembling direction of the second mounting member (16), and a locking portion (50) is provided at the distal end portion of the second mounting member (16) in the assembling direction to the bracket (66), and the locking portion (50) is inserted into and locked to the locking hole (96), thereby preventing return in the direction opposite to the assembly direction.

Description

Vibration-proof device with bracket

Technical Field

The present invention relates to a vibration isolator with a bracket (blacket) in which a vibration isolator main body is assembled to the bracket in a lateral direction.

Background

Conventionally, a vibration damping device for an engine mount (mount) or the like is known. The vibration damping device is provided with a vibration damping device body in which a first mounting member and a second mounting member are connected by a body rubber elastic body. Further, in the vibration damping device, there is a type in which a bracket is attached to a second attachment member of a vibration damping device main body, and the second attachment member is attached to a vehicle body via the bracket. As the vibration isolation device with a bracket, for example, there is a vibration isolation device with a bracket disclosed in japanese unexamined patent publication No. 2010-528233 (patent document 1).

However, in the vibration isolator with bracket, the fitting portions provided on both sides in the width direction of the second mounting member may be fitted into the fitting grooves provided on the opposing inner surfaces on both sides in the width direction of the bracket, and the vibration isolator main body may be assembled to the bracket from the lateral direction. In the above-described structure for assembling the vibration damping device body and the bracket, a mechanism for preventing the vibration damping device body from coming off the bracket may be provided. In patent document 1, the fitting portion of the second mounting member is passed over the engaging projection provided in the fitting groove, thereby preventing the second mounting member from falling off the bracket.

Documents of the prior art

Patent literature

Patent document 1: japanese Kokai publication No. 2010-528233

Disclosure of Invention

Problems to be solved by the invention

However, as a result of the studies by the present inventor, in the snap structure of patent document 1, since the snap projection is located in the fitting groove, it is difficult to confirm whether or not the second mounting member is surely engaged over the snap projection.

Further, since the snap projection is formed by digging out the wall of the fitting groove, there is a case where a reduction in strength of the fitting groove becomes a problem. Further, since the projecting direction of the snap projection is substantially orthogonal to the extending direction of the fitting groove, the die structure may become complicated when manufacturing the bracket.

The present invention provides a vibration isolator with a bracket, which has a novel structure and can prevent a vibration isolator main body from falling off from the bracket with high reliability by using a structure which can be easily manufactured.

Means for solving the problems

The following embodiments are described as exemplary embodiments, and can be appropriately combined and used, or can be appropriately combined and used with any of the components described in the other embodiments, as long as the components described in the respective embodiments can be recognized and used as independently as possible. Thus, the present invention is not limited to the embodiment described below, and various other embodiments can be adopted.

A first aspect is a bracketed vibration isolator in which a first mounting member and a second mounting member are connected to each other by a rubber elastic body, wherein fitting portions provided on both sides in a width direction of the second mounting member are fitted into fitting grooves provided on opposing inner surfaces on both sides in the width direction of the bracket, and the isolator main body is assembled to the bracket from a lateral direction, wherein a distal wall portion of the bracket located on a distal side in an assembling direction of the second mounting member is provided with a locking hole, and a distal end portion of the second mounting member in the assembling direction of the bracket is provided with a locking portion that is inserted into the locking hole and locked so as to prevent a return in a direction opposite to the assembling direction.

According to the vibration isolator with bracket having the structure according to the present embodiment, since the locking hole of the bracket is provided in the distal wall portion that is offset from the fitting groove, it is possible to avoid the formation of the locking hole from affecting the strength of the fitting groove. Therefore, by fitting the fitting portion of the second mounting member, sufficient strength is secured in the fitting groove in which stress is likely to act, and the second mounting member is prevented from falling off the bracket by inserting and locking the locking portion into the locking hole.

Since the locking hole is provided in the distal wall portion located on the far side in the assembling direction of the second mounting member to the bracket, the locking hole is formed in the extending direction of the fitting groove. Therefore, when the bracket is manufactured, the mold for molding the inner surface of the bracket is easily inserted and removed in the assembling direction and the opposite direction, and the locking hole can be formed by a simple mold structure that opens the mold in the assembling direction.

The locking hole is provided to penetrate the distal wall portion, so that the insertion and locking of the locking portion with respect to the locking hole can be easily confirmed by visual observation. Therefore, manufacturing defects such as defective locking are prevented by reliably determining whether or not the locking portion is correctly inserted and locked in the locking hole, and the vibration isolator main body is prevented from falling off from the bracket with high reliability.

The locking portion of the second mounting member is provided at a distal end portion in an assembling direction of the bracket. Thus, when the second mounting member is assembled to the bracket, the engagement portion is first inserted into the area surrounded by the bracket and protected, and therefore the engagement portion is hardly damaged at the time of assembly.

A second aspect is the vibration isolator with bracket according to the first aspect, wherein a recess having an open outer surface is provided in the distal wall portion of the bracket, and the locking hole is formed in a bottom portion of the recess.

According to the vibration isolator with a bracket having the structure according to the present embodiment, the distal end portion of the locking portion that penetrates through the locking hole and protrudes can be prevented from protruding greatly from the outer surface of the distal wall portion. In particular, if the depth of the recess is set to be larger than the protruding height of the tip portion of the locking portion from the locking hole, the tip portion of the locking portion can be accommodated in the recess without protruding to the outside. This prevents, for example, the tip end portion of the protruding locking portion from being caught by another member or the like, and the locking between the locking portion and the locking hole from being accidentally released. Further, the size of the vibration isolator with a bracket can be reduced by reducing the projecting height of the distal end portion of the locking portion.

Effects of the invention

According to the present invention, it is possible to provide a vibration isolator with a bracket, in which a vibration isolator main body is prevented from coming off the bracket with high reliability by a structure that can be easily manufactured.

Drawings

Fig. 1 is a perspective view showing an engine mount according to a first embodiment of the present invention.

Fig. 2 is a perspective view of the engine mount shown in fig. 1 at another angle.

Fig. 3 is a front view of the engine mount shown in fig. 1.

Fig. 4 is a sectional view of the engine bracket shown in fig. 3, and is an IV-IV sectional view of fig. 5.

Fig. 5 is a V-V sectional view of fig. 3.

Fig. 6 is a perspective view of a mount main body constituting the engine mount shown in fig. 1.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 to 5 show an engine mount 10 for an automobile as a first embodiment of a vibration isolator with bracket according to the present invention. The engine mount 10 includes a mount main body 12 as a vibration isolator main body. In the following description, in principle, the vertical direction, the front-rear direction, and the left-right direction refer to the vertical direction in fig. 3, the direction perpendicular to the paper surface in fig. 3, and the left-right direction in fig. 3, which are the stent center axis directions, respectively.

More specifically, as shown in fig. 6, the holder main body 12 has a structure in which the first mounting member 14 and the second mounting member 16 are coupled to each other by the main body rubber elastic body 18.

The first mounting member 14 is a highly rigid member made of metal, synthetic resin, or the like, and is a solid circular block as shown in fig. 4 and 5. The first mounting member 14 is reduced in diameter downward. The first mounting member 14 has screw holes 20 that are open on the upper surface and extend in the up-down direction.

The second mounting member 16 includes a fastening member 22. Fastening member 22 is a member having the same high rigidity as first mounting member 14, and has a substantially rectangular frame shape. The fixing member 22 is formed such that the outer peripheral portion protrudes downward from the inner peripheral portion and the vertical dimension thereof is increased. The pair of

fitting portions

24 and 24 to be fitted into the fitting groove 86 of the outer bracket 66 described later are formed by outer peripheral portions of the fastening member 22 having a large vertical dimension corresponding to both sides in the width direction of the second mounting member 16 in the left-right direction in fig. 4.

Fastening members 22 of the first mounting member 14 and the second mounting member 16 are arranged vertically apart on substantially the same central axis, and a main rubber elastic body 18 is provided between the first mounting member 14 and the fastening member 22. The main rubber elastic body 18 has a substantially truncated cone shape, and the first mounting member 14 is fixed to an upper portion on the smaller diameter side, and the fixing member 22 of the second mounting member 16 is fixed to an outer peripheral surface of a lower portion on the larger diameter side. The main rubber elastic body 18 is vulcanized and bonded to the fastening member 22 of the first mounting member 14 and the second mounting member 16 during molding.

The main rubber elastic body 18 includes a concave portion 26 that opens downward. The concave portion 26 is tapered such that the upper portion of the peripheral wall is reduced in diameter upward. The main rubber elastic body 18 has a tapered cross-sectional shape inclined toward the outer periphery in the downward direction by forming the concave portion 26.

As shown in fig. 4 and 6, a press-fitting rubber 28 formed integrally with the main rubber elastic body 18 is fixed to the lower surface and the lower portion of the outer peripheral surface of the fitting portion 24 of the fixing member 22. The press-fitting rubber 28 is fixed to the central portion of the fixing member 22 in the front-rear direction, and is continuous with the main rubber elastic body 18 on the outer peripheral side of the concave portion 26.

A partition member 30 is mounted in the fastening member 22 constituting the second mounting member 16. The partition member 30 is generally circular plate-shaped in its entirety, having a configuration in which a movable member 36 is fitted between a partition member main body 32 and a cover member 34.

In the partition member main body 32, a peripheral groove 38 extending in the peripheral direction at an outer peripheral portion over a length of less than one turn is formed so as to be open on the upper surface. A lower communication hole 40 penetrating a lower wall of the peripheral groove 38 is formed at one end of the peripheral groove 38. In an inner peripheral portion of the partition member main body 32, an annular accommodation recess 42 is formed so as to be opened on the upper surface. A plurality of lower through holes 44 are formed through the lower wall portion of the accommodation recess 42.

The cover member 34 is a thin circular plate, and is fixed to the upper surface of the partition member body 32 in a superposed manner. In the lid member 34, an upper communication hole, not shown, is formed in a portion covering the other end portion of the peripheral groove 38. In the lid member 34, a plurality of upper through holes, not shown, are formed in a portion covering the accommodation recess 42.

The movable member 36 is accommodated in the accommodation recess 42 of the partition member main body 32. The movable member 36 is a rubber elastic body having a substantially annular plate shape, and has an inner peripheral end portion and an outer peripheral end portion each protruding upward to be thick. Further, in a state where the movable member 36 is inserted into the accommodation recess 42, the cover member 34 is fixed to the partition member main body 32, so that the movable member 36 is accommodated in the accommodation recess 42 between the partition member main body 32 and the cover member 34. The thick inner and outer peripheral ends of the movable member 36 are sandwiched between the partition member body 32 and the cover member 34 in the vertical direction, and elastic deformation in the thickness direction is permitted between these inner and outer peripheral ends.

A flexible film 46 formed of a thin-walled elastomer is provided below the partition member 30. The outer peripheral end of the flexible film 46 is thick, and the flexible film 46 is overlapped on the lower surface of the partition member main body 32. In an assembled state in which the frame-shaped support member 48 is overlapped from below with respect to the outer peripheral end portion of the flexible film 46 and the holder main body 12 described later is assembled to the outer bracket 66, the outer peripheral end portion of the flexible film 46 is sandwiched between the partition member main body 32 and the support member 48.

The support member 48 is a member constituting the second mounting member 16 in the present embodiment, and is a member having the same high rigidity as the fixed member 22. In an assembled state in which the holder main body 12 described later is assembled to the outer bracket 66, the inner peripheral portion of the support member 48 sandwiches the flexible film 46, and the outer peripheral portion abuts against the lower surface of the partition member main body 32. Thus, the support member 48 is positioned with respect to the fixing member 22 via the partition member main body 32, and the fixing member 22 and the support member 48 constitute the second mounting member 16 of the present embodiment.

A locking portion 50 is provided in front of the support member 48. As shown in fig. 5 and 6, the locking portion 50 has a structure in which a plate-shaped insertion portion 52 protruding from the front surface of the support member 48 and a locking protrusion 54 protruding upward from the insertion portion 52 are integrally formed. The side surface of the locking projection 54 on the rear side extends substantially perpendicularly to the front-rear direction. The front end surface of the locking portion 50 is an inclined surface 56 that is inclined downward toward the front. Thus, the projecting tip end portion of the locking portion 50 is formed to be gradually thinned in the vertical direction toward the front side which becomes the projecting tip end side.

The partition member 30 and the flexible film 46 are mounted with respect to the second mounting member 16 constituting the integrally vulcanization molded article of the main rubber elastic body 18, so that a pressure receiving chamber 58, a part of the wall portion of which is constituted by the main rubber elastic body 18, is formed between the main rubber elastic body 18 and the partition member 30. Further, a balance chamber 60 in which a part of the wall portion is constituted by the flexible film 46 is formed between the partition member 30 and the flexible film 46. A non-compressive fluid is enclosed in the pressure receiving chamber 58 and the equilibrium chamber 60. The incompressible fluid is not particularly limited, and water, ethylene glycol, or the like is used, for example. The incompressible fluid may be a mixed liquid.

The pressure receiving chamber 58 and the equilibrium chamber 60 communicate with each other through a throttle passage 62 including the circumferential groove 38. The orifice passage 62 extends in the circumferential direction in the outer peripheral portion of the partition member 30, and both end portions are connected to one of the pressure receiving chamber 58 and the equilibrium chamber 60. When vibration in the vertical direction is input between the first mounting member 14 and the second mounting member 16 and an internal pressure difference is generated between the pressure receiving chamber 58 and the equilibrium chamber 60, a fluid flow through the orifice passage 62 is generated between the pressure receiving chamber 58 and the equilibrium chamber 60, and vibration damping effects such as high damping action based on the flow action of the fluid are exerted. In the orifice passage 62, the tuning frequency, which is the resonance frequency of the flowing fluid, is adjusted to the frequency of vibration to be damped, for example, a low frequency of about 10Hz corresponding to engine shake, according to the ratio of the passage cross-sectional area to the passage length.

One of the hydraulic pressure of the pressure receiving chamber 58 and the hydraulic pressure of the equilibrium chamber 60 is applied to each of the upper and lower surfaces of the movable member 36 disposed in the accommodation recess 42. When vibration in the vertical direction is input between the first mounting member 14 and the second mounting member 16 and an internal pressure difference is generated between the pressure receiving chamber 58 and the equilibrium chamber 60, the movable member 36 elastically deforms in the thickness direction, and the hydraulic pressure in the pressure receiving chamber 58 is transmitted to the equilibrium chamber 60 and is released.

When low-frequency large-amplitude vibration is input, the fluid flow through the orifice passage 62 is actively generated in the resonance state, and the vibration damping effect by high attenuation is exhibited. When low-frequency large-amplitude vibration is input, the deformation of the movable member 36 cannot follow the shape completely, and the function of releasing the hydraulic pressure due to the deformation of the movable member 36 is not exerted, so that the flow of the fluid through the orifice passage 62 is efficiently generated. When a small amplitude vibration of a medium frequency or a high frequency is input, the orifice passage 62 is in a substantially blocked state due to anti-resonance. When a small amplitude vibration of a medium frequency or a high frequency is input, the movable member 36 is actively elastically deformed in a resonant state to release the hydraulic pressure, and a vibration damping effect by lowering the dynamic stiffness is exhibited.

An inner bracket 64 and an outer bracket 66 as brackets are attached to the holder main body 12.

The inner bracket 64 is a plate-shaped member, and includes a coupling portion 68 that is overlapped on the upper surface of the first mounting member 14 and projects forward (rightward in fig. 5), and a mounting portion 70 that is integrally formed in front of the coupling portion 68. The coupling portion 68 includes a bolt hole 72 that penetrates in the vertical direction at a portion overlapping the upper surface of the first mounting member 14. The mounting portion 70 includes bolt holes 74 that protrude to the left and right sides with respect to the coupling portion 68 and penetrate in the vertical direction. Then, the inner bracket 64 is fixed to the first mounting member 14 and attached to the bracket main body 12 by fastening bolts 76 inserted through the bolt holes 72 of the fastening portions 68 being screwed into the bolt holes 20 of the first mounting member 14.

The outer bracket 66 is provided with a pair of

leg portions

78, 78. The pair of

leg portions

78, 78 extend in the vertical direction and are provided to face each other in the left-right direction. The upper end portions of the pair of

leg portions

78, 78 are connected to each other by an integrally formed top wall portion 80. Mounting pieces 82 protruding outward in the left-right direction are provided at the lower end portions of the pair of leg portions 78, and bolt holes 84 (see fig. 1, 2) penetrating in the up-down direction are formed in the respective mounting pieces 82.

The pair of

leg portions

78, 78 have opposing

inner surfaces

85, 85 that face each other in the left-right direction in fig. 4, which is the width direction of the outer bracket 66, and are provided with

fitting grooves

86, 86 that open at the opposing

inner surfaces

85, 85 in the left-right direction. The

fitting grooves

86, 86 provided on both sides in the width direction of the outer bracket 66 extend straight in the front-rear direction, one end portion reaches the rear ends of the pair of

leg portions

78, 78 and opens at the rear surface, and the other end portion does not reach the front ends of the pair of

leg portions

78, 78.

A clamping portion 88 that protrudes inward in the facing direction of the pair of

leg portions

78, 78 is provided below the

fitting grooves

86, 86 in the pair of

leg portions

78, 78. The left and right side portions of the holding portion 88 are connected to each other at both ends in the front-rear direction in the left-right direction, and are cylindrical as a whole.

Distal wall portions 90 are provided at the front end portions of the pair of

leg portions

78, 78. The distal wall portion 90 is plate-shaped extending in a crossing direction crossing the front-rear direction, and has left and right end portions connected to the pair of

leg portions

78, 78. The upper end portion of the distal wall portion 90 is separated downward with respect to the top wall portion 80, and an insertion hole 92 penetrating in the front-rear direction is formed between the distal wall portion 90 and the top wall portion 80. A recess 94 is formed in the distal wall portion 90. As shown in fig. 1 and 3, the recess 94 is formed in the center portion of the distal wall portion 90 in the left-right direction. The recess 94 opens at the front surface of the distal wall portion 90, which is an outer surface with respect to the space in which the holder main body 12 is disposed. The depth dimension of the recess 94 is formed to be larger than the front-rear dimension from the rear surface to the front end side of the locking projection 54 of the locking portion 50 in the holder main body 12.

As shown in fig. 5, a locking hole 96 is formed in the bottom of the recess 94 in the distal wall portion 90. The locking hole 96 penetrates the distal wall portion 90 in the front-rear direction in the formation portion of the recess 94. The locking hole 96 has a hole cross-sectional shape substantially corresponding to a projected shape of the locking portion 50 of the holder main body 12 in the front-rear direction.

The holder main body 12 is mounted to the outer bracket 66. That is, the holder main body 12 is disposed so as to be inserted from the rear toward the front in the assembly direction with respect to the space surrounded by the pair of leg portions 78, the top wall portion 80, and the clamping portion 88 of the outer bracket 66. At this time, as shown in fig. 4, in the second mounting member 16 of the bracket body 12, the

fitting portions

24, 24 on both the left and right sides of the fixing member 22 are fitted into the

fitting grooves

86, 86 of the pair of

leg portions

78, 78. In addition, in the second mounting member 16 of the bracket main body 12, the lower surface of the support member 48 overlaps the upper surface of the clamping portion 88 of the outer bracket 66. Thereby, the second mounting member 16 is fixed to the outer bracket 66, and the holder main body 12 is assembled to the outer bracket 66 from a lateral direction substantially orthogonal to the vertical direction.

Press-fitting rubbers 28 are fixed to the

fitting portions

24, 24 of the second mounting member 16, respectively, and the left and right outer surfaces and the lower surfaces of the

fitting portions

24, 24 are fitted into the

fitting grooves

86, 86 via the press-fitting

rubbers

28, 28. This prevents the

fitting portions

24, 24 and the

fitting grooves

86, 86 from being fitted poorly due to dimensional errors, and reduces the dispersion of the force required for fitting.

Forces in directions approaching each other in the vertical direction act on the fixed member 22 fitted in the

fitting grooves

86, 86 and the support member 48 superimposed on the upper surface of the clamping portion 88. Thereby, the lower end portion of the main rubber elastic body 18 is compressed in the up-down direction between the fastening member 22 and the partition member 30, while the outer peripheral end portion of the flexible film 46 is compressed in the up-down direction between the partition member 30 and the support member 48. This improves the fluid tightness in the wall portions of the pressure receiving chamber 58 and the equilibrium chamber 60, thereby avoiding problems such as liquid leakage.

As shown in fig. 5, the holder main body 12 is assembled to the outer bracket 66, and the locking portion 50 provided to the support member 48 of the holder main body 12 is inserted into the locking hole 96 formed in the distal wall portion 90 of the outer bracket 66. That is, in the locking portion 50 provided at the front end portion in the assembling direction of the holder main body 12 to the outer bracket 66, the inclined surface 56 is pressed against the opening peripheral edge portion of the locking hole 96, and the locking portion 50 is inserted through the locking hole 96 while being elastically deflected. When the locking projection 54 of the locking portion 50 moves to a position ahead of the locking hole 96, the following posture is assumed: the pressure contact between the inner surface of the peripheral wall of the locking hole 96 and the locking projection 54 is released, the locking portion 50 returns to the original shape, and the locking portion 50 is inserted into the locking hole 96 through the insertion portion 52.

The locking portion 50 is provided at a front end portion in an assembling direction to the outer bracket 66 in the holder main body 12. Therefore, when assembling the holder main body 12 to the outer bracket 66, the locking portion 50 is first inserted into an area surrounded by the pair of

leg portions

78, 78 and the top wall portion 80 of the outer bracket 66 and the clamping portion 88. As a result, in the work of assembling the holder body 12 to the outer holder 66, the outer holder 66 protects the locking portion 50 and the locking portion 50 is easily prevented from being damaged.

The direction in which the

fitting portions

24, 24 are guided by the

fitting grooves

86, 86 and the direction in which the locking portion 50 is inserted into the locking hole 96 are the same direction as each other. Therefore, the

engagement portions

24, 24 are fitted into the engagement grooves 86, whereby the locking portion 50 is easily inserted into and locked to the locking hole 96.

The locking portion 50 inserted into the locking hole 96 and returned to the original shape is formed in a state where the upper end of the locking protrusion 54 protrudes above the opening of the locking hole 96. Thus, when the holder main body 12 moves rearward in the detaching direction opposite to the assembling direction with respect to the outer bracket 66, the locking projection 54 of the locking portion 50 is locked to the opening peripheral edge portion of the locking hole 96, and the holder main body 12 is prevented from returning rearward with respect to the outer bracket 66. Thus, the locking portion 50 of the holder main body 12 is inserted into and locked to the locking hole 96 of the outer bracket 66, and constitutes a retaining mechanism for preventing the holder main body 12 from coming off the outer bracket 66.

The retaining mechanism for preventing the separation of the holder main body 12 and the outer bracket 66 is provided independently of the assembly structure of the holder main body 12 and the outer bracket 66 in which the

fitting portions

24, 24 of the holder main body 12 are fitted into the

fitting grooves

86, 86 of the outer bracket 66. Therefore, the strength of assembly of the holder main body 12 and the outer bracket 66 by fitting the

fitting portions

24, 24 and the

fitting grooves

86, 86 is sufficiently ensured, and the holder main body 12 is prevented from coming off the outer bracket 66.

The locking hole 96 is provided to linearly penetrate the distal wall portion 90 in the front-rear direction including the assembling direction of the holder main body 12 to the outer bracket 66. Therefore, when the outer bracket 66 is molded by casting (die casting), the distal wall portion 90 can be formed by a molding die that opens forward and backward, and the locking hole 96 can be easily formed. Further, since the

fitting grooves

86, 86 also extend in the front-rear direction, the opposing

inner surfaces

85, 85 of the pair of

leg portions

78, 78 can be formed by a molding die that opens front and rear, and both the

fitting grooves

86, 86 and the locking hole 96 can be formed easily.

Since the distal end portion of the locking portion 50 inserted into the locking hole 96 protrudes forward beyond the distal wall portion 90 and is exposed, it can be easily confirmed by visual observation that the locking portion 50 is locked to the locking hole 96 in an accurate state.

The inner bracket 64 and the outer bracket 66 are mounted to the engine mount 10 of the mount main body 12, and the inner bracket 64 is mounted to a power unit, not shown, by bolts, not shown, inserted through the bolt holes 74, 74 of the mounting portion 70, for example. The inner bracket 64 passes through the insertion hole 92 of the outer bracket 66 and projects forward from the distal wall portion 90 of the outer bracket 66. In the engine mount 10, the outer bracket 66 is attached to a vehicle body, not shown, by bolts, not shown, inserted through bolt holes 84, 84 of the attachment pieces 82, for example. Thereby, the power unit is coupled to the vehicle body via the engine mount 10 in a vibration-proof manner.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the specific descriptions thereof. For example, although the second mounting member 16 of the above embodiment is divided into the fixed member 22 and the support member 48, a second mounting member that is a single member as a whole may be employed.

The locking portion may be provided on the second mounting member, and for example, in the above embodiment, the locking portion 50 may be provided on the fastening member 22 constituting the second mounting member 16. The specific shape of the locking portion is not limited as long as the locking portion can be inserted into and locked in the locking hole. For example, the following configuration and the like can also be adopted: the locking protrusions are provided to protrude upward and downward, slits extending perpendicular to the vertical direction are formed in the upper and lower middle portions of the locking protrusion forming portions, the vertical width of the slits is narrowed, and the locking portions are bent and inserted into the locking holes.

A plurality of sets of locking portions and locking holes may be provided. Thus, when the vibration isolator main body is displaced in a direction of coming off the bracket, loads acting on the insertion locking portions of the locking portions and the locking holes are dispersed, and durability is improved. In addition, other retaining mechanisms may be used in addition to the retaining mechanism based on the insertion and locking of the locking portion into the locking hole. Specifically, for example, as disclosed in japanese patent application laid-open No. 2017-214968, a lock protrusion may be provided in a fitting groove of an outer bracket, and the lock protrusion may be locked to a fitting portion of a second mounting member to constitute a retaining mechanism.

The recess 94 for accommodating the tip end portion of the locking portion 50 is not essential. In the case where the recess 94 is provided, the depth dimension of the recess 94 may be smaller than the length dimension of the distal end portion of the locking portion 50. In this case, the length of the portion of the locking portion 50 protruding from the recess 94 can be reduced, so that it is difficult for other members around the locking portion 50 to interfere with each other.

The sealing may be completed not only in a structure in which the pressure receiving chamber and the equilibrium chamber are sealed by assembling the vibration damping device body to the bracket, but also in a state in which the vibration damping device body is separated from the bracket before being attached. The vibration damping device body is not limited to a vibration damping device body having a liquid seal structure, and a solid-state vibration damping device body having no liquid seal structure such as a pressure receiving chamber and a balance chamber may be used.

Description of the reference numerals

10: an engine mount (vibration isolator with bracket);

12: a bracket body (vibration isolator body);

14: a first mounting member;

16: a second mounting member;

18: a main rubber elastic body;

20: screw holes;

22: a fixed connection member;

24: a fitting portion;

26: a concave portion;

28: pressing rubber in;

30: a partition member;

32: a partition member main body;

34: a cover member;

36: a movable member;

38: a peripheral groove;

40: a lower communication hole;

42: an accommodating recess;

44: a lower through hole;

46: a flexible film;

48: a support member;

50: a locking part;

52: a plug-in portion;

54: a locking protrusion;

56: an inclined surface;

58: a pressure receiving chamber;

60: a balancing chamber;

62: a throttle passage;

64: an inner bracket;

66: an outer bracket (cradle);

68: a connecting portion;

70: an installation part;

72: bolt holes;

74: bolt holes;

76: a connecting bolt;

78: a leg portion;

80: a top wall portion;

82: mounting a sheet;

84: bolt holes;

85: an opposed inner surface;

86: a fitting groove;

88: a clamping portion;

90: a distal wall portion;

92: inserting through holes;

94: a recess;

96: a locking hole.

Claims

1. A bracket-equipped anti-vibration device (10) in which, in an anti-vibration device body (12) formed by connecting a first mounting member (14) and a second mounting member (16) by a body rubber elastic body (18), fitting portions (24) provided on both sides in the width direction of the second mounting member (16) are fitted into fitting grooves (86) provided on opposing inner surfaces on both sides in the width direction of a bracket (66), and the anti-vibration device body (12) is assembled to the bracket (66) from the lateral direction, wherein,

a distal wall portion (90) of the bracket (66) located at a distal side in an assembling direction of the second mounting member (16) is provided with a latching hole (96), and on the other hand,

a locking part (50) is arranged at the front end part of the second mounting member (16) in the assembling direction of the bracket (66), the locking part (50) is inserted into the locking hole (96) for locking, thereby preventing the return in the direction opposite to the assembling direction,

the locking hole (96) and the locking portion (50) are provided along the plate-shaped distal wall portion (90) that extends in a cross direction that intersects the assembly direction, and do not overlap the fitting portion (24) and the fitting groove (86).

2. The bracketed vibration isolator (10) according to claim 1,

a recess (94) having an open outer surface is provided in the distal wall portion (90) of the bracket (66), and the locking hole (96) is formed in the bottom of the recess (94).